Rotary valve.



E. A. NELSON.

ROTARY VALVE.

APPLICATION FILED 00T.13, 1910.

1,103,996, Patented July 21, 1914.

JWWWM ROTARY VALVE.

Application filed October 13,1910. serial no. teaaso. I

To all whom it may concern: I

Be it known that I, EMIL A. Nnnson, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Rotary Valves, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention relates ticularly designed for use on explosion engines of the multi-cylinder type, and the invention consists in the construct-ion as hereinafter set forth.

In the drawings, Figure 1 is a longitudinal section partly in elevation through the valve and its case; Fig. 2 is a cross section on line 50-00 Fig. 1; Fig. 3 is a section on line y-y Fig. 1

A is the casing of a multi-cylinder explosion engine, B is a valve case integral with the casing and G is a rotary valve in the case B. The valve G extends to the various cylinders of the engine and is provided with a series of ports D D for respectively registering with the ports E of be several cylinders.

To prevent leakage, around the valve and from the ports of one cylinder to another, the clearance between the valve and its seat is reduced to the minimum, and there is also preferably provided means for introducing a lubricant in this clearance space for completing the seal. As shown, means employed consists in a channel F extending longitudinally of the valve and having a segmental insert G therein fitted with just sufficient clearance to permit a film of oil to pass from the channel to the valve.

The construction as thus far described will be eflective where the machining of the valve and its seat is mechanically .perfect and where there is no distortion due to the heating of the metal or from other causes. It has however been found in practice that from one cause or another there is frequently a slight disalinement of the valve and its case, causing port-ions of the valve to bear with greater pressure upon the adjacent case than other portions. As a result the friction is greatly increased and also the wearing of the metal. The greater the number of cylinders in the construction, the

EMIL A. NELSON, or nn'rnoinjiaiorricnn, ASSIGNOR T0 ROTARY VALVE MGTOR COMPANY, or :on'rno-rr, MECHIGAN, A conrone'rroiv or MICHIGAN.

l Specification of Letters Patent.

to rotary valves parthousandths of the lubricating Patented July 21, 1914.

more this effect will be intensified through the greater length of valve. The present invention is designed to overcome this difliculty by dividing the valve into a plurality of sections with flexible connections therebetween. This will permit each valve section to seat independently of the others and will relieve the stress that would otherwise be developed where the sections of the case are not in perfect alinement with each other. At the same time, the valve is a unit in so far as all the sections are compelled to rotate together and preferably all of said sec tions are formed integral with the metal intermediate the sections reduced in diameter to form the flexible connection.

As shown, H are annular grooves cut in the valve intermediate the adjacent ports D and D thereof. These grooves extend inward so as to only leave a sufficient section I to transmit the torque from one section of the valve to another. The rigidity of the connection is however, greatly diminished and will permit a deflection of one section in relation to another by a comparatively slight stress. The amount of deflection necessary to obtain the proper seating of the valve is very slight, seldom exceeding a few provided for by the reduced section.

Leakage from the port of one cylinder to an adjacent one is guarded against by the use of packing rings J arranged between adjacent portions of the valve- These rings are preferably located in the groove or channel H and thus a double function is performed by said channel, first, by imparting flexibility to the valve, and second, by forming a recess for the reception of the packing ring. 7

What I claim as my invention is: 1. The combination with a cylindrical valve case, of a rotary valve therein having a plurality of ported sections, grooves in termediate adjacent sections reducing the area of the cross section to increase the flexibility thereof, and a packing ring engaging said groove.

2. The combination with a cylindrical valve case, of a rotary valve therein having an inch, and this is easily cross section to increase the flexibility thereof, and a packing ring engaging said groove.

3. The combination with the valve case of an explosion engine, Of a rotary valve therein having ports in different longltudlnal said valve for increasing the flexibility thereof intermediate the adjacent ports and farming av recess for receiving said packing 10 r1I'1g.-

In testimony whereof I aflix my. signature p e e oftwo Witnesses. H H v EMIL'A. NELSON.

Witnesses:

W'. J. 'BELKNAP,

MARIOKB FAYL Copies of this patent may be obtained for five cents each, by addressing the f Commissioner of Patents,

Washington, I). C. L 

